... board, PVC filmType: long, round hole hole hole, triangular, square, the scales, bridge type hole, lozenge hole, the hole, ... diameter, punching (0.3 mm -100 millimeter). Products with high precision, small error, good quality. Material: low carbon steel, ... characteristics: stamping, According to the hole hole, rewards points: square hole, round holes lozenge hole hole, triangle, directed rewards. ...